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Preparation method of high-temperature corrosion inhibitor for inhibiting petroleum acid corrosion

A technology of high-temperature corrosion inhibitor and petroleum acid, which is applied in the preparation of sulfonic acid, carboxylic acid amide, and organic compound, can solve the problems of difficult degradation, human and environmental hazards, and unsatisfactory corrosion inhibition effect High corrosion efficiency and good thermal stability

Inactive Publication Date: 2017-08-08
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most high-temperature corrosion inhibitors are either toxic or difficult to degrade, causing certain harm to humans and the environment, or have unsatisfactory corrosion inhibition effects at high temperatures. Therefore, the development of environmentally friendly high-temperature corrosion inhibitors is more in line with the needs of today's society Environmental needs
However, there are few types and applications of high-temperature corrosion inhibitors at present, and they are generally obtained by compounding several reagents, and the corrosion inhibition effect in practical applications is not ideal. Etchants have broad application prospects

Method used

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  • Preparation method of high-temperature corrosion inhibitor for inhibiting petroleum acid corrosion
  • Preparation method of high-temperature corrosion inhibitor for inhibiting petroleum acid corrosion
  • Preparation method of high-temperature corrosion inhibitor for inhibiting petroleum acid corrosion

Examples

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Embodiment 1

[0017] Embodiment 1, a kind of preparation method that suppresses petroleum acid corrosion high temperature corrosion inhibitor, comprises the following steps:

[0018] Step 1) Weigh 10g of p-aminophenol and dissolve it in 80g of dimethylformamide (DMF) solution, heat to 60°C, add 25g of tall oil fatty acid dropwise under stirring, after the dropwise addition is completed, heat up to 80°C, Continue to stir and react for 3 hours, then raise the temperature to 170°C, and separate the generated water from the water separator by reflux; cool down to 95°C after anhydrous distillation, and use a rotary evaporator to remove the solvent dimethyl in the product under reduced pressure Dimethylformamide (DMF) to obtain a yellow viscous liquid alkylamidophenol;

[0019] Step 2) Add 10 g of concentrated sulfuric acid with a mass fraction of 98% to the alkylamidophenol, control the reaction temperature at 70°C for 3 hours to generate ammonium sulfate, add 12 g of potassium hydroxide solid a...

Embodiment 2

[0020] Embodiment 2, a kind of preparation method that suppresses petroleum acid corrosion high-temperature corrosion inhibitor, comprises the following steps:

[0021] Step 1) Weigh 13g of p-aminophenol and dissolve it in 80g of dimethylformamide (DMF) solution, heat to 60°C, add 32.5g of tall oil fatty acid dropwise under stirring, after the dropwise addition, heat up to 80°C ℃, continue to stir the reaction for 3 hours, then raise the temperature to 180 ℃, and separate the generated water from the water separator by reflux; cool down to 90 ℃ after anhydrous distillation, and use a rotary evaporator to remove the solvent in the product under reduced pressure Dimethylformamide (DMF) gives yellow viscous liquid alkylamidophenol;

[0022] Step 2) Adding 13g of concentrated sulfuric acid with a mass fraction of 98% to the alkylamidophenol, controlling the reaction temperature at 70-75°C for 2-3 hours to generate ammonium sulfate, adding 15.6g of potassium hydroxide solid after t...

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Abstract

The invention discloses a preparation method of a high-temperature corrosion inhibitor for inhibiting petroleum acid corrosion. The preparation method comprises the following steps: weighing p-aminophenol, dissolving the p-aminophenol in a dimethyl formamide (DMF) solution, heating, adding tall oil fatty acid dropwise while stirring, heating after finishing the dropwise adding, continuously stirring for reacting, heating, and separating generated water out of a water segregator through backflow; cooling after no water is distilled off, removing the DMF serving as a solvent from a product under reduced pressure with a rotary evaporator to obtain yellow thick liquid alkyl acylamino phenol; adding concentrated sulfuric acid into the alkyl acylamino phenol for reacting to generate ammonium sulfate, adding a potassium hydroxide solid after finishing the reaction for compounding to obtain a sulfonated fatty acylamino phenol corrosion inhibitor, namely, the high-temperature corrosion inhibitor for inhibiting petroleum acid corrosion. The prepared corrosion inhibitor meets the requirements of high temperature resistance and efficient corrosion inhibition, and is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of oil field anticorrosion, in particular to a preparation method of a high-temperature corrosion inhibitor for inhibiting petroleum acid corrosion. Background technique [0002] Acidic substances in petroleum are collectively referred to as petroleum acid. Petroleum acid mainly includes naphthenic acid, fatty acid, aromatic acid and some other inorganic acids, accounting for 1% to 2% of crude oil. Petroleum acid, organic sulfur, inorganic salts and some corrosive additives are the main factors causing corrosion of equipment during crude oil extraction and processing, while petroleum acid is highly corrosive to refining equipment, especially the corrosion of high temperature parts most serious. At present, the addition of high-temperature corrosion inhibitors is one of the most effective measures to inhibit petroleum acid corrosion. However, since petroleum refining needs to be carried out at a high tempera...

Claims

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Application Information

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IPC IPC(8): C07C303/06C07C309/51C09K8/54
CPCC09K8/54C07C231/02C07C303/06C09K2208/32C07C309/51C07C233/75C23F11/145
Inventor 柯从玉孙妩娟张群正张洵立
Owner XI'AN PETROLEUM UNIVERSITY
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